20404448 has 48 divisors (see below), whose sum is σ = 42223104. Its totient is φ = 9694080.

The previous prime is 20404441. The next prime is 20404453. The reversal of 20404448 is 84440402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66311 + ... + 66617.

It is an arithmetic number, because the mean of its divisors is an integer number (879648).

Almost surely, 2^20404448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20404448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21111552).

20404448 is an abundant number, since it is smaller than the sum of its proper divisors (21818656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20404448 is a wasteful number, since it uses less digits than its factorization.

20404448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 20404448 is about 4517.1282912930. The cubic root of 20404448 is about 273.2592991375.

The spelling of 20404448 in words is "twenty million, four hundred four thousand, four hundred forty-eight".